Improvement



WILLIAM PHIPPS.

Improvement in Nut Locks.

Patented June I3, 7871.

Fig.2.

5 E 5 S e nu I... -I.

WILLIAM H. PHIPPS, OF SOUTHBOROUGH, MASSACHUSETTS.

lMPRQVEMENT IN NUT-LOCKS.

Specification forming part of Letters Patent No. 115,889, dated June 13,1871.

I, WILLIAn H. PHIPPs, of Southborough, in the county of Worcester andState of Massachusetts, have invented certain Improvements in Nut-Locks,of which the following is a specification:

Figure 1 is a perspective View; Fig. 2, an end elevation. Figs. 3 and 4are views of parts detached.

The object of this invention is to produce a device which, of itself,will allow a nut to be screwed inward on its bolt, but will prevent thesame from being turned outward or removed from the bolt; and it consistsin providing said bolt with a longitudinal wedgeshaped groove of a depthless than half the diameter of the bolt, in which groove is located acurved piece of spring steel running longitudinally of the same, beingexactly the width of one side of said groove, as will hereinafter morefully appear.

A represents the bolt, which is provided with a suitable thread, and hasa longitudinal wedge-shaped groove, B, which extends into the' sametoward the center, as shown, its depth being less than half the diameterof the bolt A. In the groove B, and resting against one side thereof, isa piece of spring-steel, G, which extends from the pointed bottom ofsaid groove to the top of the same, its outer edge being sharpened andexactly flush with the periphery of the bolt A, as shown in Fig. 2. Thepiece 0 is slightly curved, as shown in Fig. 4;. 1) represents the nut,which is of the usual form.

Operation. In screwing up the nut D itis turned in the direction of thearrow, Fig.2, and its bore passes over the sharpened edge of spring 0without obstruction, the latter bearin g against 1 the side of thegroove B; but when the nut is turned in the opposite direction the edgeof Fig. 3, can be inserted in the groove B, as

shown in dotted lines in Fig. 2, thereby holding the spring 0 tightlyagainst the side of groove B, and allowing the nut to be turned ineither direction. The spring 0 is prevented from falling from groove Bby a projection, I, or other suitable device.

Claim.

The nut-lock described, consisting of bolt A,

having wedge-shaped groove B and curved spring-plate O I, substantiallyas described.

In testimony whereot'I have sign ed my name to this specification in thepresence of two subscribing witnesses.

Witnesses: WILLIAM H. PHIPPS.

CARROLL D. WRIGHT, CHARLES F. Bnoww.

